This code allows you to save the entry ID of the current entry in one of its fields.

Use this code to create an entry in Form B when you submit an entry in Form A. A field in Form B will have the user ID from Form A. Another will have the entry ID of Form A entry. And a final will have the value of another field in Form A. If you use the code as written, the user ID and additional value are treated as required. If they're not present, the entry won't be created. You can remove or comment out code you don't want to use.

Use this code to copy the user_id from an embedded form to the main form. For example, you can insert your registration as an embedded form of your main form, have users register in it and use this to link your main form to the user.